Solar cell



FIG. 1 is a front elevational view of a solar cell showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is an enlarged view of portion 3 in FIG. 1; and,

FIG. 4 is an enlarged view of portion 4 in FIG. 2.

There is no substantial thickness of the claimed design and all elements of the claimed design are flat and coplanar. 

CLAIM The ornamental design for a solar cell, as shown and described. 